# ${{\boldsymbol \gamma}}$ ENERGY IN ${{\boldsymbol \Upsilon}{(3S)}}$ DECAY INSPIRE search

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 920.6 {}^{+2.8}_{-3.2}}$ OUR AVERAGE
$918.6$ $\pm6.0$ $\pm1.9$ $2.3$ $\pm0.5$k 1
 2010
CLEO ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit X}}$
$921.2$ ${}^{+2.1}_{-2.8}$ $\pm2.4$ $19$ $\pm3$k 1
 2008 V
BABR ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit X}}$
1  Assuming ${\Gamma}_{{\mathit \eta}_{{b}}{(1S)}}$ = 10 MeV. Not independent of the corresponding mass or mass difference measurements.
References:
 BONVICINI 2010
PR D81 031104 Measurement of the ${{\mathit \eta}_{{b}}{(1S)}}$ Mass and the Branching Fraction for ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}_{{b}}{(1S)}}$
 AUBERT 2008V
PRL 101 071801 Observation of the Bottomonium Ground State in the Decay ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}_{{b}}}$